But the tragedy was a reminder of a similar incident from last year, when Anthony Cassano -- a boy of almost the exact same age as Escoto -- died at Ultra from a drug overdose.

In light of Escoto's death, Riptide went back and pulled Cassano's toxicology report, which has previously been unreported. According to a report from the Miami-Dade Medical Examiner's Office (included below), Cassano had marijuana in his system when he died. The cause of death, however, was "acute methylone toxicity" -- in other words, a methylone overdose.

Unlike pure MDMA, however, methylone has proven to be deadly. It is one of several chemical compounds commonly called "bath salts" and was among the drugs banned by Florida Attorney General Pam Bondi in January 2011.

Seizures of the drug by Miami police show that it is increasingly being mixed into or passed off as Molly. In 2011, only eight percent of "Molly" seized by Miami police contained methylone, according to the Herald. A year later, however, 82 percent did. Meanwhile, "Molly" seizures rose 63 percent.

On April 2, 2011, 23-year-old Jairious McGhee became the first Floridian to die from methylone. Tampa Police found "banging on cars and acting crazy," according to local TV station WTSP.

When cops approached McGhee, they found the young man was incoherent. He had bloodshot eyes, dry lips, and had urinated on himself.

Adonis Escoto died on Saturday night while attending Ultra. A toxicology report has not yet been completed

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"Essentially your body temperature gets so high and your body can't handle that high temperature, your muscle start breaking down and when that happens, your organs start failing," said Dr. Julie Pearson, the medical examiner who diagnosed the deadly methylone overdose. "It's such a new drug, we don't know how much they need to take to produce those side effects."

Whether or not Cassano knew what he was taking, the results were the same as McGhee. On Sunday, March 17, 2013, he "started showing signs of erratic behavior" while attending Ultra.

Paramedics were called, but Cassano was pronounced dead at the hospital from "multiple organ failure," according to a police report.

Cassano's family could not be reached for comment. Ultra has never responded to our requests for more information on the death.

Michael E. Miller was the senior writer at the Miami New Times. For five years, he covered everything Florida could throw at him. He got an innocent man off of murder charges and got a bad cop suspended from duty. He flew in homemade airplanes, dove into the Atlantic in a tiny submarine, and skateboarded a marathon. He smoked stogies, interviewed strippers, and narrowly survived a cavity search in a Panamanian jungle prison — all in the name of journalism. His only regret is that one time he outed Colombian drug lords for sneaking strippers into Miami jail. For that, he says lo siento. He was only doing his job. Miller’s work for New Times won many national awards including back-to-back Sigma Delta Chi medallions. He has also written for the New York Times, Newsweek, The Atlantic, Chicago Magazine, Village Voice, the New York Daily News, and VQR. He now covers foreign affairs for the Washington Post.